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“粉冶-鑄-鍛”聯(lián)合體的塑性變形與微觀結構
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西北工業(yè)大學

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中圖分類號:

TG319, V263

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中國博士后科學基金;國家自然科學基金項目（面上項目，重點項目，重大項目）


Plastic deformation and microstructures of powder/metallurgy-solidified-wrought complex structure
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Northwestern Polytechnical University

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    摘要:

    實現(xiàn)盤緣與盤心異種變形高溫合金的高強冶金連接是制造雙合金渦輪盤的關鍵。本研究選擇粉末高溫合金為盤緣材料、變形高溫合金為盤心材料，采用電子束焊接盤緣與盤心。電子束焊接后的焊縫區(qū)域不僅具有兩種母材的結構特征（即粉末高溫合金和變形高溫合金的結構特征），而且焊縫區(qū)存在明顯的鑄造組織。兩種高溫合金材料電子束焊接后形成了組織特征鮮明的“粉冶-鑄-鍛” 結構。本文首次研究了“粉冶-鑄-鍛”的變形行為，并重點探討了焊縫的組織演化規(guī)律。相關研究結果不僅豐富了異種高溫材料連接區(qū)的增強方法與組織控制方法，而且為發(fā)展雙合金等溫變形技術提供了科學依據(jù)。

    Abstract:

    How to improve the combines strength of bore and rim materials becomes most critical and practical problem for manufacting dual-alloys turbine disk. This research tried to address this issue. In this research, wrought superalloy GH4133B with equiaxed grains has been chosen as bore material and P/M superalloy FGH4096 with PPB nets has been chosen as rim material for dual-alloys turbine disk in present research. Electron beam welding was conducted on as-polished superalloys, and P/M-solidified-wrought (P/M-S-W) complex structure was obtained. Cylindrical compression specimens were machined from the central position of P/M-S-W complex structure. A series of isothermal compression tests were conducted on a thermo-simulation machine. Based on the compression results and the related analyses, plastic deformation and microstructure evolution of P/M-S-W complex structures have been investigated. This research has great effect on improving microstructure controlling theory and developing isothermal deformation technology for dual alloys.

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寧永權.“粉冶-鑄-鍛”聯(lián)合體的塑性變形與微觀結構[J].稀有金屬材料與工程,2017,46(2):527~532.[Ning Yongquan. Plastic deformation and microstructures of powder/metallurgy-solidified-wrought complex structure[J]. Rare Metal Materials and Engineering,2017,46(2):527~532.]
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  • 收稿日期:2014-11-04
  • 最后修改日期:2015-11-09
  • 錄用日期:2015-12-08
  • 在線發(fā)布日期: 2017-04-10
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